When did Himachal Pradesh become Union Territory under Lt Governor?

The correct answer is: A. 1st November, 1956

Himachal Pradesh became a Union Territory under Lt Governor on 1st November, 1956. Prior to that, it was a part of the Punjab province.

The other options are incorrect because:

• Option B is the date on which the States Reorganisation Act, 1956 came into effect. This act reorganized the states of India on linguistic lines. However, Himachal Pradesh was not affected by this act.
• Option C is the date on which the Himachal Pradesh Statehood Bill, 1971 was passed by the Parliament of India. This bill granted statehood to Himachal Pradesh. However, Himachal Pradesh was a Union Territory for 15 years before it became a state.
• Option D is the date on which India gained independence from British rule. However, Himachal Pradesh was not a separate entity at the time of independence. It was a part of the Punjab province.